Kicking people out can be tricky depending on the structure and bylaws of a given place. I've seen different kinds and you'll always have a part of your members that wilm think it is too much and others not enough. In the end what caused 99.9% of the issues I saw in the hackerspaces I've been part of wasn't the people kicked out arbitrarly or too lightly, it was that abusing people were allowed to stay for too long. The reasons were multiple. But in the end if you want to keep the culture alive you have to remove the elements that work against that culture. Or start/find a new place if the whole culture shifts with the majority of the members.

It was unanimous except for the person getting kicked out. The violations of rules or lack of effort was given ample warning to be corrected.